﻿North American Kcrhvxchia 239 



Sporophytc I o— 



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to the right ; capsule brown to red-brown, oblong-ovoid to oblong- 

 cylindric, unsymmetric, inclined to horizontal; urn 2-2.5 : 1, con- 



stricted below mouth when dry; operculum Vz-fi length of 



urn, abruptly long-rostrate ; annul us of 2 or three rows of cells ; 

 segments nearly as long as teeth, split ; cilia 2 or 3, nodose ; 

 spores 10-12/^, nearly smooth, maturing in autumn. 



Type locality, European. 



On the ground, roots of trees, and decaying logs in woods and 



shady places ; seemingly preferring steep shaded banks of ravines. 



Ranging from Washington, British Columbia and Alaska to 



Adi 



the mountains of Colorado. 



Illustrations. Br. Sch. 1. c ; Hedw. 1. c. ; Wils. Bryol. 



pl- 55 ; Husnot, B 

 Mosses, //. 57. K. 



pi. 06 ; Dixon & J 



The leaves of this species and its relatives vary so in shape 

 that any attempt to define species by the degree of acuteness of 

 the leaves or other similar character seems futile. 



2a. Eurhynchium strigosum ROBUSTUM Roell, Hedwigia, 36 : 



52. 1897. 



Eurhynchium strigosum (in part) of American authors. 

 Gamctophytc with the habit of Brachythecium plttmosum, in 



wide intricate mats, green to yellow-green ; stems creeping, 

 densely radiculose, 5-10 cm. long, often stoloniferous at the ends, 

 pmnately or subfasciculately branching ; brandies 6-12 mm. long, 

 ascending or erect, often fasciculately divided, terete-foliate, more 

 blunt than in E. strigosum ; leaves from the middle of the branches 

 erect-spreading, ovate-lanceolate, very slightly or not at all decur- 

 rent, 1 — 1 .3 x 0.4-0.5 mm., usually acute ; quadrate and oval alar 

 cells confined to the extreme angles ; stem leaves 1.2-1.5 x 0.4-0.6 

 mm., longer acuminate, acumination often subfiliform. Sporophytc 

 rather larger than in the typical form. 



Type locality, vicinity of Chicago, Illinois. Type duplicate in 

 the herbarium of Columbia University. 



Eastern Canada and in the United States from Louisiana to 

 Minnesota and eastward. 



Exsiccati, (As Hypuum strigosum^ Drumm. Muse. Am. 



M 



(S. States) 131 ; Sulliv. Muse Allegh. 1 r ; Sulliv. & Lesq. M 



